| Bit Position | Name | Description | 
| 0-1 | Not used | Always 0. | 
| 2 | Error/Event Queue | Set to “1” if error/event queue contains data; reset to "0” when all data has been retrieved. | 
| 3 | Questionable Status Register Summary | Set to “1” when one of the enabled bits in status event status register is set to “1.” | 
| 4 | MAV (Message Available) | Set to “1” when output queue contains data; reset to “0” when all data has been retrieved. | 
| 5 | Standard Event Status Register Summary | Set to “1” when one of the enabled bits in status event status register is set to “1.” | 
| 6 | RQS/MSS | Set to “1” when any of the status byte register bits enabled by service request enable register is set to “1”; reset to "0” when all data has been retrieved through serial polling. See IEEE 488.1 and IEEE 488.2 standards for details. | 
| 7 | Operation Status Register Summary | Set to “1” when one of the enabled bits in operational status register is set to “1.” | 
Issuing the *CLS command will clear all of the bits from the status byte register.